Is Elsa correct in determining that the equation log2(x) = …

Mathematics Questions

Is Elsa correct in determining that the equation log2(x) = log2(3x + 5) + 4 has no solution? Explain.

Short Answer

The process to solve the logarithmic equation starts by rearranging it to log2x – log2(3x+5) = 4, applying the properties of logarithms to get log(2x / (3x + 5)) = 4, and finally converting to base form resulting in 10^4 = (2x / (3x + 5)), which leads to a solution of x approximately equal to 1.667.

Step-by-Step Solution

Step 1: Rearranging the Equation

To begin with, we need to simplify the given logarithmic equation. This involves transposing the term log2(3x+5) to the other side. The new equation becomes:

  • log2x – log2(3x+5) = 4

Step 2: Applying Logarithm Properties

Next, we apply the properties of logarithms to simplify the equation further. This is done using the quotient rule, which allows us to express it as:

  • log(2x / (3x + 5)) = 4

Step 3: Converting to Base Form and Solving

The final step involves converting the logarithmic equation into base form. This means we express the equation as:

  • 10^4 = (2x / (3x + 5))

After rearranging and solving this equation, we find that the value of x is approximately 1.667.

Related Concepts

Transposing

The process of moving a term from one side of an equation to the other while changing its sign.

Logarithm Properties

Rules that govern the manipulation of logarithmic expressions, including the product, quotient, and power rules.

Base Form

The representation of a logarithmic equation in the form of an exponential equation, which expresses the relationship between the base and the argument of the logarithm.

Scroll to Top